SiTime has introduced the Elite 2 Super-TCXO for timing and synchronization in AI data center infrastructure, where large GPU clusters depend on tightly coordinated workloads. The device is designed to improve time synchronization across distributed compute systems, reducing timing error between GPUs that are working on shared AI tasks. Elite 2 Super-TCXO is a MEMS-based temperature-compensated oscillator used to provide highly stable timing for AI data centers, high-performance compute, networking, and synchronization-critical infrastructure. It sits within the timing architecture of the system, supporting network synchronization and clock stability as workloads move across accelerators.
The new family is aimed at AI clusters moving toward much tighter synchronization targets. SiTime says the industry is working toward 10ns cluster-wide time synchronization, compared with around 1µs today, while Elite 2 is specified for 1ns time synchronization accuracy. That places the oscillator closer to the timing budget of accelerated compute systems, where small clock errors can create wait cycles, reduce utilization, or force system-level recovery behavior.
Timing Stability Inside AI Data Centers
GPU clusters do not operate as isolated processors. AI workloads are split across many devices, and those devices need to exchange data in controlled time windows. When synchronization drifts, systems have to leave margin to prevent data corruption or timeouts. The result can be lower GPU utilization, even when the available compute hardware is expensive and physically installed.
Elite 2 addresses that timing layer through short-term stability and temperature behavior rather than by increasing compute performance directly. SiTime specifies sub-nanosecond synchronization capability, supported by ±2ppb/°C frequency slope, 6 × 10⁻¹² Allan deviation, and ±50ppb frequency stability over -40°C to +105°C. Those figures point to a device intended for fast-changing thermal and airflow conditions, which are normal in densely packed data center hardware.
MEMS Timing Without Quartz Activity Dips
The Elite 2 Super-TCXO is built on SiTime’s solid-state silicon MEMS technology. SiTime says the device eliminates activity dips and micro jumps associated with quartz technology, which can affect timing behavior under changing environmental conditions. The device is also specified for resistance to shock, vibration, and board bending.
For AI servers and networking equipment, that mechanical robustness is relevant because timing components are not operating in calm conditions. Boards experience airflow, thermal gradients, vibration, and handling stress. A timing source that holds stability through those conditions can reduce the amount of margin needed elsewhere in the synchronization chain.
Packages And Frequency Control
Elite 2 is available in a 3.2mm × 2.5mm plastic package with an 8mm² footprint and a 5.0mm × 3.2mm ceramic package. The smaller package gives designers a way to place high-stability timing closer to dense board areas where timing distribution, routing, and power integrity are already constrained.
The family also supports digital frequency tuning, which helps with timing-aware network design. SiTime’s product information lists 1.8V, 2.5V, 3.0V, and 3.3V supply options, with digital frequency pulling through I²C on supported variants. This gives system designers a controlled way to tune frequency in synchronization-sensitive infrastructure rather than relying only on fixed oscillator behavior.
Elite 2 Part Numbers And Availability
The Elite 2 Super-TCXO family includes SiT5234, SiT5235, SiT5434, and SiT5435. SiTime’s current product pages identify SiT5234 and SiT5434 as 1MHz to 60MHz devices, with the corresponding SiT5235 and SiT5435 covering higher frequency ranges in the family. The devices are sampling now, with commercial production expected in Q3 2026. The launch positions Elite 2 for AI data centers, high-performance compute, networking systems, and other infrastructure where synchronization accuracy has started to influence overall system efficiency.
View the Elite 2 Super-TCXO datasheet
Learn more and read the original announcement at www.sitime.com
Technology Overview
SiTime Elite 2 Super-TCXO is a MEMS-based temperature-compensated oscillator family for synchronization-critical infrastructure, including AI data centers, high-performance compute, networking, and precision GNSS systems. The family supports 1ns time synchronization accuracy, ±2ppb/°C frequency slope, 6 × 10⁻¹² Allan deviation, ±50ppb stability over -40°C to +105°C, and package options of 3.2mm × 2.5mm plastic or 5.0mm × 3.2mm ceramic.
Frequently Asked Questions
What is the SiTime Elite 2 Super-TCXO used for?
Elite 2 is used as a stable timing source for synchronization-critical systems, including AI data centers, high-performance compute, networking equipment, and precision GNSS infrastructure.
Which Elite 2 Super-TCXO part numbers are available?
The Elite 2 family includes SiT5234, SiT5235, SiT5434, and SiT5435.
What package options are available for Elite 2 Super-TCXO?
SiTime lists 3.2mm × 2.5mm plastic and 5.0mm × 3.2mm ceramic package options for the Elite 2 Super-TCXO family.
